PDF malware analysis — malicious · 2e70872a31bfad4f

MALICIOUS

PDF

79.8 KB Created: 2021-09-09 15:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 705fb067c83051c6177b88f61eba0735 SHA-1: d3d6b5f04b2eb881524c87284f9f9a126bcd6dbd SHA-256: 2e70872a31bfad4fdd3d7b2f7a9ecdc2f281d962cff67a88ffefa5c61a6ac9fb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a mix of compromised WordPress sites and disposable domains, indicative of a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://garglob.ru/uplcv?utm_term=android+convert+mp4+to+mp3 PDF link annotation
- https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/8a98c564d8fa4de345ed2b6463c4a9d2/pixutajiwajuzadatesulij.pdfIn PDF document text
- http://abwingsjanaf.com/uploads/files/gokabovibavejivagenogoz.pdfIn PDF document text
- http://veronikavilla.hu/userfiles/file/vujipasodimonokutadopomu.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161345f1e2a14e---29912173126.pdfIn PDF document text
- https://xtremefitksa.com/ckfinder/userfiles/files/wusupe.pdfIn PDF document text
- http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613257405a62f---76661095792.pdfIn PDF document text
- https://tenekedjieva.com/uploads/file/jowugaraxeminuzaxiza.pdfIn PDF document text
- https://ustunbilgisayar.com/userfiles/files/momovonexefuwodewel.pdfIn PDF document text
- https://hankilfood.com/upfile/files/bifiposixutipupomeragudox.pdfIn PDF document text
- http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lutoloniligumopopobitod.pdfIn PDF document text
- http://aadcnfgl.netsociality.com/upload/files/12991965177.pdfIn PDF document text
- https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/tobefewinorinezise.pdfIn PDF document text
- https://mediaget.ru/userfiles/files/wonon.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/lndekrpd6303ee2lqc1rque2ld/41397921730.pdfIn PDF document text
- https://manualismedicina.hu/fileok/file/971747109.pdfIn PDF document text
- https://drivetripper.com/userfiles2020/files/46746423845.pdfIn PDF document text
- http://teifsepahan.com/files/file/32468688703.pdfIn PDF document text
- http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziropuzomomo.pdfIn PDF document text
- https://trainova.com/userfiles/file/77619508312.pdfIn PDF document text
- https://mp2020.csysadmin.com/ckfinder/userfiles/files/69363154605.pdfIn PDF document text
- https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/55260c1600815f3315ec2802844e59cb/xibawodixu.pdfIn PDF document text
- https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/161364e9cbd9e1---42796612962.pdfIn PDF document text
- http://arnoldbolingbroke.com/ckfinder/userfiles/files/bapegesewuluxipitiv.pdfIn PDF document text
- https://myparrotfood.com/user_files/files/47109956828.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d135.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD135	10596 bytes
SHA-256: `142dcf99ff149c431b09fc2c6cc14c957cdfac3b3dc9fdd46a1b2ba238453aca`
`font_01_sfnt_off0000e971.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE971	18860 bytes
SHA-256: `8b6f5edcb0a7bdca8df9285925d8fade5e67ed42b231b2ec5eeda9043581bfa0`
`font_02_sfnt_off000119a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119A4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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